ACCOMMODATION AND ENVIRONMENTAL CONDITIONS TEST METHOD AND METHOD VALIDATION

KAN-TN-LP 03 Issue Number : 3 April 2016 Dokumen ini tidak dikendalikan jika diunduh Uncontrolled when downloaded 2. Laboratory personnel have the knowledge, skills, and abilities based on education, experience, demonstrated skills, and training. To perform their duties. 3. Full educational and professional records of all technical staffs available to confirm their competence in Mechanical physical testing. f. Laboratory shall establish and define an internal training program and ensure the competency of laboratory personnel. g. Laboratory shall have training procedure that used to ensure that training has taken place with each employee for procedures and methods that the employee performs. The procedure applies to on-the-job training, in-house training and new-hire training. h. The laboratory shall maintain an up-to-date record of the training that each member of staff has received.

3. ACCOMMODATION AND ENVIRONMENTAL CONDITIONS

a. The laboratories are designed to provide space, engineering controls, and proper environmental conditions for optimal sample storage, sample handling, and analysis, in accordance with general laboratory practices, and environment suitable for the tasks carried out Mechanical physical testing. b. Laboratory shall have distinct space, in line with the safety requirements, for performing Mechanical physical testing.

4. TEST METHOD AND METHOD VALIDATION

a. When choosing a Rockwell hardness machine, consider factors such as: 1. The accuracy and measurement repeatability that is required; 2. Whether versatility in the testing cycle may be required; 3. The required speed of testing; 4. The Rockwell scales that will be used; 5. The required resolution of the hardness number; 6. The size of material normally tested; and 7. The accessories that may be needed. KAN-TN-LP 03 Issue Number : 3 April 2016 Dokumen ini tidak dikendalikan jika diunduh Uncontrolled when downloaded b. When using devices that employ measurement methods other than the Rockwell indentation hardness principle, the type of measurement device that was used should be reported with the correlated Rockwell numbers. c. The anvils and the anvil seat should be routinely cleaned and inspected for damage and replaced or reground when damage occurs. d. A dirty anvil seat and almost any perceptible flaw on the anvil and anvil seat, such as scratches or indents, can significantly affect the hardness result. e. When testing large samples of test material or material with a long shape that significantly overhangs the hardness machine’s anvil support, the material should be additionally supported using suitable outboard fixtures. f. Otherwise, the overhang may cause a cantilever or lateral force to be applied to the indenter, resulting in measurement error or damage to the indenter. g. These types of parts should not be supported by hand. 1. It is very important that the method used to attach an anvil to a Rockwell machine prevents any rocking or other movement of the anvil during the test. Many Rockwell machine designs attach the anvil by inserting its base into a slip fitting. This design is suitable for most purposes, although for critical applications, it may be beneficial to rigidly affix the anvil to the testing machine. 2. T o selecting a Rockwell scale, the operator should select the scale that specifies the largest load and smallest indenter possible to do the job without exceeding defined operating conditions and accounting for conditions that influence the test result. These influencing conditions include test specimens which are below the minimum thickness for the depth of indentation. 3. A test impression that falls too close to the edge of a specimen or another impression, indentations should be spaced greater than 3x indentation diameter and greater than 2-12x diameter from the edge of the specimen. 4. The axis of test be within 2 degrees of perpendicular; there should be no deflection of the test sample or tester during the load application, from conditions such as dirt under the test specimen or on the elevating screw; surface finish should be kept; surface conditions such as decarburization from heat treatment should be removed. KAN-TN-LP 03 Issue Number : 3 April 2016 Dokumen ini tidak dikendalikan jika diunduh Uncontrolled when downloaded 5. C old rolled sheet metal is that work hardening can create a gradient of hardness through the sample so any test is measuring the average of the hardness over the depth of indentation effect. h. Each time an anvil is installed, regardless of its design, it must be adequately seated to the testing machine by making repeated hardness tests on a uniform piece of material, such as a test block. The test shall repeat until there is no increasing or decreasing trend in the measured hardness values. i. When testing curved parts, it is extremely important that the part is properly aligned such that the indentation is made at the apex of a convex surface or at the bottom of a concave surface. j. The test method are adequately documented are based on the latest valid edition of a published reference method, including: i. Title and method number; ii. scope and field of application; iii. Number of revision; iv. page numbering, total number of pages; v. references; vi. principles and definitions; vii. apparatus; viii. expression of results; ix. performance criteria; x. issuing authority.

5. EQUIPMENT AND MEASUREMENT TRACEABILITY